[Pacemaker] Two node cluster and no hardware device for stonith.

[Dmitry Koterov]

Could you please give a hint: how to use fencing in case the nodes are all
in different geo-distributed datacenters? How people do that? Because there
could be a network disconnection between datacenters, and we have no chance
to send a stonith signal somewhere.

On Wednesday, February 4, 2015, Andrea <a.bacchi at codices.com> wrote:

> Digimer <lists at ...> writes:
>
> >
> > That fence failed until the network came back makes your fence method
> > less than ideal. Will it eventually fence with the network still failed?
> >
> > Most importantly though; Cluster resources blocked while the fence was
> > pending? If so, then your cluster is safe, and that is the most
> > important part.
> >
> Hi Digimer
>
> I'm using for fencing a remote NAS, attached via iscsi target.
> During network failure, for example on node2, each node try to fence other
> node.
> Fencing action on node1 get success, but on node2 fail, because it can't
> see
> iscsi target(network is down!) .
> I thinks it's the reason why node2 doesn't reboot now, because it can't
> make
> operation on key reservation and watchdog can't check for this.
> When network come back, watchdog can check for key registration and reboot
> node2.
>
> For clustered filesystem I planned to use ping resource with location
> constraint as described here
>
> http://clusterlabs.org/doc/en-US/Pacemaker/1.0/html/Pacemaker_Explained/ch09s03s03s02.html
> If the node can't see iscsi target..then..stop AppServer, Filesystem ecc
>
> But it doesn't works. In the node with network failure i see in the log
> that
> pingd is set to 0 but Filesystem resource doesn't stop.
>
> I will continue testing...
>
> Thanks
> Andrea
>
>
>
>
>
>
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